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                <span class="article-type type-1 float-left">原</span>                <h1 class="title-article">mysql默认连接超时问题的解决方法</h1>
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                                                                                                                                            <span class="time">2016年08月13日 20:39:36</span>
                    <a class="follow-nickName" href="https://me.csdn.net/chzh101011" target="_blank">chzh101011</a>
                    <span class="read-count">阅读数 3996</span>
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<p>       最近做的一个项目有时候因为长时间没有人访问，等到再访问时，控制台会总会报  MySQL server has gone away 的问题，提示系统不能连接数据库，找其原因，原来是mysql默认连接时间超时导致的，及mysql默认的 wait_timeout 时间超时，mysql默认时间为8小时，对此问题，可有两种解决办法，本篇文章只给出其中一种详细的解决办法</p>
<p>（1）修改mysql的 wait_timeout，使其时间变长</p>
<p>         1）在mysql安装目录下找到my.ini文件；</p>
<p>          2）打开文件后，在文件的最后一行添加如下代码：wait_timeout=2880000，这样把之前的超时限制把8小时（28800）扩大为800小时（添加后不为800小时，应该是超过了MySQL允许的最大时间）；</p>
<p>          3）重启mysql后再在其中输入命令：show global variables like "wait_timeout";查看时间是否发生改变，如果改变，代表修改成功；</p>
<p>          4）重启tomcat或其他应用程序的服务器(如果已启动)，OK。</p>
<p>（2）写一段小程序检验mysql的连接状态，如果是断开，使其进行重新连接。<br /></p>
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